--- title: "Astronergy CHSM66N(DG)/F-BH-735 vs Astronergy CHSM66RN(DG)/F-BQ-645 - Solar Panel Comparison | ComparePV" description: "Compare Astronergy CHSM66N(DG)/F-BH-735 vs Astronergy CHSM66RN(DG)/F-BQ-645 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/astronergy-chsm66n-dg-f-bh-735/astronergy-chsm66rn-dg-f-bq-645" updated: 2026-09-11 --- # Astronergy CHSM66N(DG)/F-BH-735 vs Astronergy CHSM66RN(DG)/F-BQ-645 CHSM66RN(DG)/F-BQ-645 leads on the differences that matter The largest is rated power: 90 W more power. 8 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Astronergy CHSM66N(DG)/F-BH-735](https://comparepv.com/panel/astronergy-chsm66n-dg-f-bh-735) | [Astronergy CHSM66RN(DG)/F-BQ-645](https://comparepv.com/panel/astronergy-chsm66rn-dg-f-bq-645) | | Manufacturer | Astronergy | Astronergy | | Power | 735 Wp | 645 Wp | | Efficiency | 23.70 % | 23.90 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | CHSM66N(DG)/F-BH-735 | CHSM66RN(DG)/F-BQ-645 | Difference | | --- | --- | --- | --- | | Rated power | 735 Wp | 645 Wp | +90 W for CHSM66N(DG)/F-BH-735 | | Temperature coefficient | -0.290 %/°C | -0.260 %/°C | +0.030 %/°C for CHSM66RN(DG)/F-BQ-645 | | Weight | 38.0 kg | 32.0 kg | -6.0 kg for CHSM66RN(DG)/F-BQ-645 | | Short-circuit current | 18.72 A | 16.50 A | 2.22 A apart | | Module area | 3.106 m² | 2.701 m² | 0.405 m² apart | | Module efficiency | 23.70 % | 23.90 % | +0.20 pp for CHSM66RN(DG)/F-BQ-645 | | Annual degradation | 0.40 %/yr | 0.35 %/yr | -0.05 %/yr for CHSM66RN(DG)/F-BQ-645 | | Current at max power | 17.75 A | 15.73 A | 2.02 A apart | | Cell count | 132 | 264 | 132 cells apart | | Weight per kWp | 51.7 kg/kWp | 49.6 kg/kWp | -2.1 kg/kWp for CHSM66RN(DG)/F-BQ-645 | | Dimensions | 2384x1303x33 mm | 2382x1134x30 mm | 2384x1303x33 mm vs 2382x1134x30 mm | ## Every compared parameter | Parameter | CHSM66N(DG)/F-BH-735 | CHSM66RN(DG)/F-BQ-645 | | --- | --- | --- | | Rated power | 735 Wp | 645 Wp | | Module efficiency | 23.70 % | 23.90 % | | Power density | 236.6 Wp/m² | 238.8 Wp/m² | | Open-circuit voltage | 49.77 V | 48.83 V | | Voltage at max power | 41.41 V | 41.02 V | | Short-circuit current | 18.72 A | 16.50 A | | Current at max power | 17.75 A | 15.73 A | | Temperature coefficient | -0.290 %/°C | -0.260 %/°C | | Dimensions | 2384x1303x33 mm | 2382x1134x30 mm | | Module area | 3.106 m² | 2.701 m² | | Weight | 38.0 kg | 32.0 kg | | Weight per kWp | 51.7 kg/kWp | 49.6 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.35 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 264 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, CHSM66N(DG)/F-BH-735:** 24,661 kWh - **Cumulative output, CHSM66RN(DG)/F-BQ-645:** 21,809 kWh - **Gap:** 2,852 kWh ## Output when hot | Condition | Cell temperature | CHSM66N(DG)/F-BH-735 | CHSM66RN(DG)/F-BQ-645 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 735 W | 645 W | 100.0% of rated power | | Cool, bright day | 40 °C | 703 W | 620 W | 95.7% of rated power | | Typical summer roof | 55 °C | 671 W | 595 W | 91.3% of rated power | | Hot roof | 70 °C | 639 W | 570 W | 87.0% of rated power | ## Against the whole database | Measure | CHSM66N(DG)/F-BH-735 | CHSM66RN(DG)/F-BQ-645 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #517 | #351 | 14,005 | CHSM66RN(DG)/F-BQ-645 leads by 166 places | | Power density | #582 | #356 | 14,005 | CHSM66RN(DG)/F-BQ-645 leads by 226 places | | Heat behaviour | #2,165 | #511 | 14,005 | CHSM66RN(DG)/F-BQ-645 leads by 1,654 places | | Weight | #5,081 | #3,158 | 14,005 | CHSM66RN(DG)/F-BQ-645 leads by 1,923 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #160 | #1,068 | 14,005 | CHSM66N(DG)/F-BH-735 leads by 908 places | ## Questions ### Which panel is better: Astronergy CHSM66N(DG)/F-BH-735 or Astronergy CHSM66RN(DG)/F-BQ-645? According to our database: **Astronergy CHSM66RN(DG)/F-BQ-645** has higher module efficiency (**23.90%** vs **23.70%**); **Astronergy CHSM66RN(DG)/F-BQ-645** tolerates heat better (temp coeff **-0.260%/°C** vs **-0.290%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Astronergy CHSM66N(DG)/F-BH-735 and Astronergy CHSM66RN(DG)/F-BQ-645? **Astronergy CHSM66N(DG)/F-BH-735** has a module efficiency of **23.70%**, while **Astronergy CHSM66RN(DG)/F-BQ-645** is **23.90%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Astronergy CHSM66N(DG)/F-BH-735 use vs Astronergy CHSM66RN(DG)/F-BQ-645? **Astronergy CHSM66N(DG)/F-BH-735** uses **TOPCon** cells; **Astronergy CHSM66RN(DG)/F-BQ-645** uses **TOPCon**. Modern **n-type** technologies (**TOPCon**, **HJT**, BC) typically deliver higher efficiency and lower degradation compared to older **PERC** (p-type) cells. ### What is the warranty on Astronergy CHSM66N(DG)/F-BH-735 and Astronergy CHSM66RN(DG)/F-BQ-645? **Astronergy CHSM66N(DG)/F-BH-735** has a **30 years** power warranty; **Astronergy CHSM66RN(DG)/F-BQ-645** has a **30 years** power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80**-87%**). Product (materials) warranties are usually shorter. ### Are Astronergy CHSM66N(DG)/F-BH-735 and Astronergy CHSM66RN(DG)/F-BQ-645 bifacial panels? Both **Astronergy CHSM66N(DG)/F-BH-735** and **Astronergy CHSM66RN(DG)/F-BQ-645** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [Astronergy CHSM66N(DG)/F-BH-735 vs Astronergy CHSM66N(DG)/F-BH-730](https://comparepv.com/compare/astronergy-chsm66n-dg-f-bh-735/astronergy-chint-new-energy-technology-co-ltd-chsm66n-dg-f-bh-730) - One difference: module efficiency - [Astronergy CHSM66N(DG)/F-BH-735 vs Astronergy CHSM66N(DG)/F-BH-725](https://comparepv.com/compare/astronergy-chsm66n-dg-f-bh-735/astronergy-chint-new-energy-technology-co-ltd-chsm66n-dg-f-bh-725) - 3 differences, the largest is module efficiency - [Astronergy CHSM66N(DG)/F-BH-735 vs Astronergy CHSM66N(DG)/F-BH-720](https://comparepv.com/compare/astronergy-chsm66n-dg-f-bh-735/astronergy-chint-new-energy-technology-co-ltd-chsm66n-dg-f-bh-720) - 3 differences, the largest is module efficiency - [Astronergy CHSM66N(DG)/F-BH-735 vs Astronergy CHSM66N(DG)/F-BH-715](https://comparepv.com/compare/astronergy-chsm66n-dg-f-bh-735/astronergy-chint-new-energy-technology-co-ltd-chsm66n-dg-f-bh-715) - 3 differences, the largest is module efficiency - [Astronergy CHSM66N(DG)/F-BH-735 vs Astronergy CHSM66N(DG)/F-BH-710](https://comparepv.com/compare/astronergy-chsm66n-dg-f-bh-735/astronergy-chint-new-energy-technology-co-ltd-chsm66n-dg-f-bh-710) - 4 differences, the largest is module efficiency - [Astronergy CHSM66RN(DG)/F-BQ-645 vs Astronergy CHSM66RN(DG)/F-BQ-670](https://comparepv.com/compare/astronergy-chsm66rn-dg-f-bq-645/astronergy-chsm66rn-dg-f-bq-670) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/astronergy-chsm66n-dg-f-bh-735/astronergy-chsm66rn-dg-f-bq-645 Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.